We flew to
Sedona, AZ for breakfast this morning. On the way there, I was playing with the leaning mode in the Dynon EMS. I was able to get the engine lean of peak without running rough which I hear is pretty rare on carburated engines. I attribute it to the new10-5217 carb that we installed last year. It runs lots smoother and uses less gas than our previous carb. I had noticed that the rpm will decline when leaning before it gets rough so thought it might run LOP. We were told that the 10-5217 incorporates an atomizer on it that more evenly distributes the gas into the incoming air.
Heres proof.
We were still climbing in this picture. I leveled off at 7500 feet and was able to get the gph down to 58% hp, 6.1 to 6.3 gph at 2350 rpm and 170 mph TAS.
This would give us a range of over 6 hours in our RV-4 (41 gal tanks). We were showing about 22 nautical mpg. Will try this at 10k to 12k and see what happens at the higher altitudes.
